Answer this question truthfully
### Question: What are normal results?
### Response: Normal value ranges for over-the-counter or prescription medications may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
A negative value usually means that alcohol, prescription medications that have not been prescribed, and illegal drugs have not been detected.
A blood toxicology screen can determine the presence and level (amount) of a drug in your body.
Urine sample results are usually reported as positive (substance is found) or negative (no substance is found).